Vulnerability-Lookup

GHSA-P9M3-8942-GXHH

Vulnerability from github – Published: 2026-10-26 18:32 – Updated: 2026-10-26 18:32

Details

Timescale pgvectorscale before 0.9.1 contains a type confusion vulnerability that allows low-privileged database users to corrupt memory by shadowing pgvector's vector type or operators. Attackers with CREATE privilege on the vectorscale schema can pre-create shadow objects, then build and query DiskANN indexes over crafted values to cause out-of-bounds reads and writes, disclosing memory, crashing the server, or escalating privileges.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

7.7 (High)


                  
                    CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-116489"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-843"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-26T16:17:18Z",
    "severity": "HIGH"
  },
  "details": "Timescale pgvectorscale before 0.9.1 contains a type confusion vulnerability that allows low-privileged database users to corrupt memory by shadowing pgvector\u0027s vector type or operators. Attackers with CREATE privilege on the vectorscale schema can pre-create shadow objects, then build and query DiskANN indexes over crafted values to cause out-of-bounds reads and writes, disclosing memory, crashing the server, or escalating privileges.",
  "id": "GHSA-p9m3-8942-gxhh",
  "modified": "2026-10-26T18:32:57Z",
  "published": "2026-10-26T18:32:57Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-116489"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/pull/280"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/mod.rs#L208-L231"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/pg_vector.rs#L133-L151"
    },
    {
      "type": "WEB",
      "url": "https://github.com/timescale/pgvectorscale/releases/tag/0.9.1"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-116489 (GCVE-0-2026-116489)

Vulnerability from cvelistv5 – Published: 2026-10-26 14:59 – Updated: 2026-10-26 14:59

Title

Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes

Summary

Severity

7.7 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6904 records in the last 180 days details

References

10 references

URL	Tags
https://github.com/timescale/pgvectorscale/pull/280	issue-trackingpatch
https://github.com/timescale/pgvectorscale/commit…	patch
https://github.com/timescale/pgvectorscale/commit…	patch
https://github.com/timescale/pgvectorscale/commit…	patch
https://github.com/timescale/pgvectorscale/blob/0…	technical-description
https://github.com/timescale/pgvectorscale/blob/0…	technical-description
https://github.com/timescale/pgvectorscale/blob/0…	technical-description
https://github.com/timescale/pgvectorscale/releas…	release-notes
https://github.com/timescale/pgvectorscale	product
https://www.vulncheck.com/advisories/timescale-pg…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
timescale	pgvectorscale	Affected: 0 , < 0.9.1 (semver)

Date Public

2026-09-04 00:00

Credits

Mehmet Ince

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "pgvectorscale",
          "vendor": "timescale",
          "versions": [
            {
              "lessThan": "0.9.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Mehmet Ince"
        }
      ],
      "datePublic": "2026-09-04T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Timescale pgvectorscale before 0.9.1 contains a type confusion vulnerability that allows low-privileged database users to corrupt memory by shadowing pgvector\u0027s vector type or operators. Attackers with CREATE privilege on the vectorscale schema can pre-create shadow objects, then build and query DiskANN indexes over crafted values to cause out-of-bounds reads and writes, disclosing memory, crashing the server, or escalating privileges."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 7.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-843",
              "description": "Access of Resource Using Incompatible Type (\u0027Type Confusion\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-26T14:59:38.170Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Pull Request #280",
          "tags": [
            "issue-tracking",
            "patch"
          ],
          "url": "https://github.com/timescale/pgvectorscale/pull/280"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/timescale/pgvectorscale/commit/1c7cb1cab919ac122f901f163a71f69a264a8f81"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/timescale/pgvectorscale/commit/59d2f573dbd7a1446728ac547576d22f5b05cfaa"
        },
        {
          "tags": [
            "patch"
          ],
          "url": "https://github.com/timescale/pgvectorscale/commit/f42f8cf29c92111add863ccf3255b3bf23fb51cd"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/mod.rs#L208-L231"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/pg_vector.rs#L133-L151"
        },
        {
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/timescale/pgvectorscale/blob/0.9.0/pgvectorscale/src/access_method/build.rs#L253"
        },
        {
          "name": "pgvectorscale 0.9.1 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/timescale/pgvectorscale/releases/tag/0.9.1"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/timescale/pgvectorscale"
        },
        {
          "name": "VulnCheck Advisory: Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/timescale-pgvectorscale-before-0.9.1-type-confusion-via-unqualified-diskann-operator-classes"
        }
      ],
      "title": "Timescale pgvectorscale before 0.9.1 Type Confusion via Unqualified DiskANN Operator Classes",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-116489",
    "datePublished": "2026-10-26T14:59:38.170Z",
    "dateReserved": "2026-10-26T11:37:39.154Z",
    "dateUpdated": "2026-10-26T14:59:38.170Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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